Properties and microstructure of copper-alloyed solid solution-strengthened ductile iron |
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Authors: | Moritz Riebisch Philipp Weiß Clemens Cremer Ibrahim Aboulkhair Andreas Bührig-Polaczek |
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Affiliation: | Foundry Institute, RWTH Aachen University, Aachen, Germany |
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Abstract: | Solid solution-strengthened ductile iron (DI) exhibits outstanding mechanical properties due to the high silicon content. The strengthening by silicon addition is limited since additions above 4.3?wt-% lead to embrittlement. For a further improvement of mechanical properties, other alloying elements need to be considered. In the present work, the effect of various copper additions on the microstructure and the mechanical properties of solid solution-strengthened DI were investigated. The results show that no appreciable strengthening can be achieved by copper addition without the formation of pearlite in the matrix. The pearlite content increases considerably for Cu-additions above 0.23?wt-% and is independent of the cooling rate for the cooling conditions analysed. |
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Keywords: | Ductile iron spheroidal graphite cast iron solid solution-strengthened ductile iron ferritic ductile iron graphite shape pearlite tensile properties |
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